History
First introduced by BMW on the 316ti compact in 2001, Valvetronic has since been added to many of BMW's engines. The Valvetronic system is coupled with BMW's proven double-VANOS, to further enhance both power and efficiency across the engine speed range. Valvetronic was not coupled to early BMW's N53, "High Precision Injection" (gasoline direct injection) technology engines due to lack of room in the cylinder head. New generation 'compact' Valvetronic allows for direct injection to utilized in the N55B30 turbo engine, as seen in the 2010 BMW 5 Series Gran Turismo.
Valvetronic was initially used on BMW's mass-market engines, mostly of the naturally aspirated variety such as the BMW N42 straight-4, N62 V8, N73 V12, and N52 straight-6. Valvetronic was not found on the directly-injected N53 straight-6, nor was it on the directly-injected and twin-turbocharged N54 straight-6 and N63 V8.
Directly-injected and turbocharged engines introduced in 2009 such as the single-turbo N55 straight-6 and the twin-turbo N74 V12 also make use of Valvetronic.
Until 2012, no high-performance M-series vehicle uses Valvetronic, instead continuing to utilise multiple throttle-bodied designs. The 2012 BMW M5 (F10), however, will use an updated S63 engine that adds Valvetronic technology in lieu of the individual throttles found on its equivalents in the BMW X5 M and X6 M. The 2013 BMW 650i Gran Coupe will also feature a Valvetronic update of the N63 engine.
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